Ok there is an npc called.......

[kewlnick12]

vehicel driver or something like that.Does it like drive the apc and stuff like in the scene where dog throws the apc at the combine soldiers?

 

[Mahalis]

Yup. Also in the bits of Route Kanal - and Exit 17 in Ep1 - in which the APC shows up. For more info, see the Valve wiki on npc_vehicledriver and npc_apcdriver.

 

[kewlnick12]

thanks mate

 

[Stene]

It is weird that there is NPC called npc_crabsynth but it isn't used in Citadel scene. It is gives error in HL2 and Ep1.

 

[kewlnick12]

I bet they where planning to use it but decided not to and then deleted most of the files but there was still one or two that lets you spawn it or something.